Looking to buy an E92 335d. I’ve seen one for sale and and trying to understand the audio system fitted. This is the only picture I have of the head unit etc:

I’m completely unfamiliar with BMW audio system, except I think there are 3 levels of amp/speaker combinations and various head units.

The seller says it’s the basic system, but it’s obviously iDrive, it had CD and DVD(?) slots and it that a dashboard centre speaker visible, which I understood was only found on the top speaker/amp combination?

Welcome to Motor Vehicle Maintenance & Repair. From what I've seen online, it looks as though you are right about the CD and DVD slots (little DVD insignia is blocked by the steering wheel). What you are seeing up top appears to be some sort of vent and not a sound port, though. Looks like iDrive due to the center screen.
– Pᴀᴜʟsᴛᴇʀ2♦Oct 9 '17 at 22:03

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Thanks - a bit of investigating reveals that the grills on the dash are there even if there is no speaker. I assumed that the 'professional' DVD/iDrive system would have the good audio, but apparently the head unit fitted bears no relationship to the speaker/amp package.
– Steve IvesOct 9 '17 at 23:11

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Does BMW do the same as Ford - go on the website : enter your VIN and it will give the original build specification (the Ford ETIS system). That may help answer your question.
– Solar MikeOct 10 '17 at 9:45

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Ok - that’s the Professional navigation system (bigger screen, more features and maybe a hard drive?). But that says noth8ng about the amp and speakers. If I could see the corners of the front windows, a lack of triangular tweeters would indicate the basic speaker system.

However BMW does/did an official Alpine amp & speaker package consisting of the tweeters, new mid range drivers for the front doors and a power amp for the boot for about £380 and a few hours of install time.